<template>
    <el-container class="home-container">
        <!-- 头部区 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>E-Commerce_Management</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主题部分 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside width="200px">
                <div class="toggle-button" @click="toggleCollaspe">|||</div>
                <!-- 侧边栏菜单区 -->
                <el-menu
                    class="el-menu-vertical-demo"
                    background-color="#333744"
                    text-color="#fff"
                    active-text-color="#409EFF"
                    unique-opened
                    :collapse="isCollapse"
                    :collapse-transition="false"
                    :router="true"
                    :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id +''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单的模板区 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <span>{{item.authName}}</span>
                        </template>
                        <!-- 二级菜单 -->
                        <el-menu-item :index="'/'+subItem.path" 
                        v-for="subItem in item.children" 
                        :key="subItem.id"
                        @click="saveNavstate('/'+subItem.path)">
                            <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
                    </el-aside>
                    <!-- 右侧主体 -->
                    <el-main>
                        <!-- 路由占位符 -->
                        <router-view>

                        </router-view>
                    </el-main>
                </el-container>
            </el-container>
</template>

<script>
export default {
    data(){
        return {
            // 左侧菜单数据
            menulist:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao'
            },
            isCollapse:false,
            //被激活的链接地址
            activePath:''
        }
    },
    created(){
        this.getMenuList(),
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods:{
        logout(){
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        // 获取所有的菜单
        async getMenuList(){
            const {data:res} = await this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menulist = res.data
            // console.log(res);
        },
        toggleCollaspe(){
            this.isCollapse = !this.isCollapse
        },
        //保存链接的激活状态
        saveNavstate(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath = activePath
        }
    }
}
</script>

<style lang="less" scoped>
    .home-container{
        height: 100%;
    }
    .el-header{
        background-color: #373d41;
        display: flex;
        justify-content: space-between;
        padding-left: 0;
        align-items: center;
        color: #fff;
        font-size: 20px;
        >div{
            display: flex;
            align-items: center;
            span{
                margin-left: 15px;
            }
        }
    }
    .el-aside{
        background-color: #333744;
        .el-menu{
            border-right: 0;
        }
    }
    .el-main{
        background-color: #eaedf1;
    }
    .iconfont{
        margin-right: 10px;
    }
    .toggle-button{
        background-color: #4a5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: .2em;
        cursor: pointer;
    }
</style>